Preheat the oven to 180°C / 350°F / Gas mark 4.
Line a baking tray with grease proof paper and set aside.
Cut the sausages to separate from one another and set aside.
Sift out some flour onto a clean surface so the puff pastry doesn’t stick.
Using the pre-made thawed puff pastry, roll one sheet out and on the diagonal, lay out the sausages and top with parmesan cheese and a gentle sprinkle of the fennel seed powder.
Fold over the pastry and seal everything in. Use a fork to create an indentation on the outer pastry area.
Cut into portions. This needs to be done quite roughly and quickly to separate the sausages even further within the pastry. Don’t worry if the cheese or sausages escape a bit.
Take the beaten egg and brush on top of the entire stuffed pastry. Place the portions onto the baking tray.
Bake in the oven for about 20-25 minutes. The pastry will be golden brown.
Serve when cooled then wrap in foil for lunches.